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Determination of Energy Source Utilized by the Light Horse¹

New Jersey Agricultural Experiment Station, New Brunswick 08903

Abstract

TROTTING for hr. significantly (P< .05) increased both arterial and venous plasma FFA of unconditioned horses. The AV difference for FFA was also significant (P< .01. After trotting for hr. muscle contained less glycogen (P<.05) and more MG, CH, FFA and TG (P<.01). Walking for hr. caused a significant (P<.05) increase in muscle CH.

In conditioned horses, there were significant increases in venous and arterial plasma FFA after trotting for hr. (P<.01 and P<.05, respectively). There were no significant differences in the plasma after walking or in muscle samples after walking or trotting for any of the parameters measured.

Conditioning produces significant increases in venous plasma MG (P<.05), CH (P< .01), FFA (P<.01) and CHE (P<.01); arterial plasma MG (P<.05) and FFA (P< .05); and muscle glycogen (P<.01), CH (P<.01) and FFA (P<.01). There were also significant (P<.01) decreases due to conditioning in muscle DG and TG.

¹ Paper of the Journal Series, Department of Animal Science, Rutgers University, The State University of New Jersey, New Brunswick.

² Departments of Animal Science and Nutrition.

³ Statistical Center.